Abstract 1,087,725. Particle accelerators. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov. 11, 1965 [Nov. 19, 1964], No. 47158/64. Heading H1D. A differential pumping tube arranged in parallel with a D.C. particle accelerator tube and having potential distributing annular electrodes 1 along its length has each electrode comprising a diametral bar 4a, 4b bent out of the plane of the electrode, all the bars being bent towards one end of the tube. An electric field having a component towards the axis of the tube is thereby set up between pairs of adjacent electrodes in order to suppress electron loading. The bars may be bent to V- or arcuate shape and successive bars may be circumferentially displaced through a small angle. Also the inner periphery of each electrode may be bent from the plane of the electrode.
IN A DIFFERENTIAL PUMPING TUBE FOR EVACUATING THE HIGH-VOLTAGE PORTION OF AN ELECTROSTATIC ACCELERATOR IN PARALLEL WITH THE ACCELERATING TUBE AND COMPRISING A PLURALITY OF ANNULAR ELECTRODES SPACED APART BY ANNULAR INSULATORS, THE IMPROVEMENT WHEREIN EACH ELECTRODE INCLUDES A SUBSTANTIALLY DIAMETRICAL BAR WHICH INTERSECTS THE AXIS OF THE TUBE, THE TWO RADIAL HALVES OF SAID BAR BEING DEFLECTED FROM A PLANE NORMAL TO THE TUBE AXIS TOWARDS ONE END OF THE TUBE TO PRODUCE AN ELECTRIC FIELD BETWEEN ADJACENT ELECTRODES HAVING A COMPONENT DIRECTED TOWARDS THE TUBE AXIS TO CAUSE DEFLECTION OF UNWANTED ELECTRONS INTO SAID ELECTRODES.
Claim 2
Dependent Claim
97 words
IN A DIFFERENTIAL PUMPING TUBE FOR EVACUATING THE HIGH-VOLTAGE PORTION OF AN ELECTROSTATIC ACCELERATOR IN PARALLEL WITH THE ACCELERATING TUBE AND COMPRISING A PLURALITY OF ANNULAR ELECTRODES SPACED APART BY ANNULAR INSULATORS, THE IMPROVEMENT WHEREIN EACH ELECTRODE INCLUDES A SUBSTANTIALLY DIAMETRICAL BAR WHICH INTERSECTS THE AXIS OF THE TUBE, THE TWO RADIAL HALVES OF SAID BAR BEING DEFLECTED FROM A PLANE NORMAL TO THE TUBE AXIS TOWARDS ONE END OF THE TUBE TO PRODUCE AN ELECTRIC FIELD BETWEEN ADJACENT ELECTRODES HAVING A COMPONENT DIRECTED TOWARDS THE TUBE AXIS TO CAUSE DEFLECTION OF UNWANTED ELECTRONS INTO SAID ELECTRODES.